Python 从父目录相对导入

Question

Here is the file structure I have:

app/
    main.py
    folder/
        a.py
        b.py

In the file a.py i have import b , and in main.py , i have import folder.a .

When I run python3 a.py from folder/ , everything works fine. However when I run python3 main.py from app/ , I get ModuleNotFoundError: No module named b , which is caused by the import in a.py

I have found a way to avoid this, which is to simply put import folder.b in a.py , but this is not very satisfying, as I can no longer lauch a.py from folder/ .

What should i do for the import to work from both folder? Please don't answer my question by saying i should modify my architecture, i've been looking for answers to this question on SO for 2 hours but i haven't found anything convincing.

Answer 1

In a.py try:

from folder import b

or:

from folder.anotherfolder import b

or in main.py:

from folder import a, b

or:

from folder.anotherfolder import a, b